add more swap

[xenoterracide]

oracle xe needs at least 256M of memory and 2G of virtual memory to install, perhaps the default swap on boxes created from this could be at 2G for this reason (specific issue is with centos-6.5)

[juliandunn]

I don't think we're going to change the default image just for one program. You'll see that my Oracle-XE cookbook has a test fixture that stands up additional swap space for testing.

https://github.com/juliandunn/oracle-xe